Dundas is located 21 kilometres north-west of the Sydney central business district, in the local government area of the City of Parramatta, and the electoral division of Bennelong.

Reverend Samuel Marsden selected an area of 100 acres in the Field of Mars Parish, and named his farm "Dundas Farm" in honour of Henry Dundas, 1st Viscount Melville.,[3][4] who was also the Principal Secretary of State for the Home Department.

The Field of Mars including the modern-day suburbs of Marsfield, Macquarie Park, Carlingford, Epping and Dundas.

In this interim period, the area was known as Pennant Hills within the Field of Mars, a name reflected in the notable Pennant Hills (Quarry), visited by Charles Darwin,[6] that operated in the area for some time.

Other languages spoken at home included Mandarin 13.6%, Korean 8.3%, Cantonese 7.5% and Arabic 3.3%.